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(No Model.) 2 Sheeps-Sheet 1.

l S. G. BRINKMAN.

ELEGIRIGALLY GONTROLLBD VENTILATOR.

Patented Jan. 10, 1893.

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(No Model.) 2 Sheets-Sheet 2.

S. G. BRINKMAN. ELEGTRIGALLY'CONTROLLED- VENTlLATOR.

No. 489,625. Patented Jan; 1o, 189s..

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Unirse STATES PATENT @trineo SEBASTIAN G. BRINKMAN, OF NEW YORK, N. Y.

ELECTRlCALLY-CONTROLLED VEN-TILATOR.

SPECIFICATION forming part of y Letters Patent No. 489,625, datedJanuary 10, 1893. Application tiled March 3, 1892. Serial No. 423.560.(No model.)

I claims.

In the accompanying drawings: Figure l is a top view of the operatingmechanism. Fig.l

2 an elevation thereof. Fig. 3 across section through a skylightprovided with my improvement. Fig. et a section on line 0c, Fig. l. Fig.5 a detail ot the operating and deteut pawl and Fig. 6 a detail of theshoulder n.

The letter a, represents a casing inclosing two pairs of electro-magnetsb, b, b', b; between these electro magnets, there oscillates upon apivot c4 hung in a bracket c', an upright armature c. To this armaturethere is attached an arm c2, terminating iu a head c3. To this headthere is pivoted a pair of diverging pawls d, d, engaging a ratchetwheel e, that revolves on a shaft e', fast on the bracket c. The wheele, is provided with a pinion e2, engaging a toothed wheel f. This wheelturns on a shaft f', and is provided with pinions f2. These pinionsengage the teeth of two racks g, g', extending in opposite directionsand meshing respectively into the top and bottom of the pinions f2. Theouter ends of the racks g, g', are pivoted to the valves h, turning onpivots h, and shown to be set into a skylight h2. Of course, theseValves exclude or admit air by being closed or opened and they may loelocated at any point where such an obj ect is to be attained. is abattery. 2, the contact posts and 3, the switch for opening and closingthe circuit. This switch I have shown to be formed by a thermostat 4,which is used when the ventilator is to operate automatically at apredetermined temperature. If this is not desired however, the switch isset by hand. 5, 6, are the two battery wires going to the binding postsj, j', respectively. If the switch is set to make contact With the post2, the current travels as follows: Through the wire 6,

post j', electro-magnets b, b, wire 7, post j, wire 8, post 2, switch 3,thermostat 4, wire 9, post j, wire 10, contact spring 7c, armature c,and out through the ground or base to the post j, and by the wire 5,back to the battery. The result will be to vibrate the armature from itscentral position toward the electromagnets b, and in this way the righthand pawl d, will revolve the ratchet wheel c, to the right so as torevolve, by the wheels e2 f, the pinions f2, to the left. Thus the racksg, g', are drawn inward to close the ventilators h.

It the switch is set to make contact with the post the current travelsas follows: Through the wire 6, post j', electro-magnets b', b', wire11, post j, wire 12, post switch 3, thermostat 4, wire 9 post js, wire13, contact spring 7o', armature c, and out through the ground or baseto the post j, and by the wire 5, back to the battery. The result willbe to vibrate the armature from its central position toward theelectro-magnets b', and in this way the left hand pawl d, will revolvethe ratchet e, to the left so as to revolve, by the wheels e2, f, thepinions f2, to the right. Thus the racks g, g', are pushed outward tothus open the ventilators h.

In order to disengage the inoperative pawl d, from the teeth of thewheel e, each pawl is provided with a backwardly and forwardly extendingpin fm. At the front, the pins are connected by a spring d. At the rearthe pins engage a shoulder n, raised at the center (Fig. 6) and held bythe bracket c', directly back of the pawls. It is clear that if thearmature is vibrated in either one direction, the pin m, of the neutralpawl ol, is by the spring d', drawn upon the raised part of the shouldern, and is thus thrown out of engagement with the wheel e.

In order to prevent the pressure of the ventilator h, exercised throughthe racks and gear wheels from counteracting the motion imparted to thegear wheel e by the pawls d, I employ a pair of detente 19,19. Thesedetents engage the ratchet wheel e, and are pivoted at p', to theshoulder n. Each deteut is provided With an upwardly projecting arm p2.These arms are adapted to be engaged by the bent ends of a rod p3,attached to the bar c2. As the armature vibrates, one of the detents p,will be'raised out of engagement with the IOO wheel e, while the otherdetent will be thrown into engagement with such Wheel. A spring p4,connecting the detents p, holds the operative detent in place andpermits it to glide over the teeth as the wheel is revolved.

The usual armature springs c are shown in Fig. 5, and are connected atone end to the armature and at the other end fixed to eyes c6.

In order to hold the racks g, g', in contact with the pinions f2, and tostill permit the slight tilting motion of suclrracks, I hang upon theshaft f', a pair of triangular bearing plates (1,(1, provided with therearwardly extending rollers (12,(23. Between these rollers and pinionsf2, the racks g, g', are introduced and as the racks swing up and down,the bearing plates q, q', will follow their motion as will be readilyunderstood.

It will be seen that by my invention, I am enabled to easily operateventilators placed at an inaccessible position, from the most desirablepoint and'without any muscular exertion or the employment of cumbersomeand unsightly motion-transmittin g mechanism.

lVhat I claim is:

l. The combination of a pair of electro magnets with an intermediatepivoted armature, a paw] connected to the armature, a ratchet Wheelengaged by the pawl, a pivoted valve and mechanism for transmitting themotion of the ratchet wheel to the valve, substantially as specified.

2. The combination of a pivoted valve with an electro-motor, pinion f2,revolved thereby and a rack engaging the pinion and secured to theValve, substantially as specified.

3. The combination of electro magnets b, b', with armature c, paWls d,ratchet Wheel e, engaged by the pawls, pinion f2, revolved by 4o theratchet Wheels, a rack engaging the pinion, and a valve secured to therack, substantially as specified.

4. The'combination of an electro-motor with a thermostat within itscircuit, a pinion revolved by the electro motor posts t" i2, forcointact with the thermostat switcli,avalve h, and racks engaging thepinion for connecting the electro-motor with such valve, substantiallyas specified.

5. The combination of electro magnets b, b', with armature c, pawls d,pivoted thereto, gear Wheel e, pinion e2, gear wheel f, pinion f2, arack engaging such pinion and a valve engaged by the rack, substantiallyas specified.

6. rlhe combination of electro-magnets b, b', with armature c, actuatingpawls (l, d, detents p, p, gear wheel e, engaged thereby, pinion f2,revolved by the gear Wheel and with rack g, and valve h, substantiallyas specified.

7. The combination of electro magnets Z), ZJ', with armature e, pawls d,d, pivoted thereto1 pins m, spring cl' and shoulder n, for disengagingthe pawls and With the pinion f2, rack g, and valve h, substantially asspecified.

S. The combination of elec-tro magnets b, Z1', with armature c, paWls d,(Z, detents p, p, arms p2, bent rod p3, spring, and with ratchet Wheele, pinion f2, rack g, and valve 7L, sub stantially as specified.

9. The combination of electro-magnets b, b', with armature c, pawls d,gear Wheel e, pinion f2, pivoted bearing plate q, rack g', engagedthereby and with valve h, engaged by the rack, substantially asspecified.

S. G. BRINKMAN. lVitnesses:

F. v. BRIEsEN, WM. SCHULZ.

